the rule of thumb here is that you should really just use one browser ad blocker. having multiple will conflict especially regarding anti-adblocker prevention (as uBO will try to hide itself and redirect to a “defused” version of an ad script and whatever other ad blocker you have will think that’s an ad and block it)

not entirely sure how well DNS ad blockers fit into this. there is a chance they could make your ad blocking detectable by blocking a request uBO intentionally lets through (possibly in a modified state), but as far as i’m aware there haven’t been too many issues stemming from combining DNS blockers with uBO and the likes.